The icicle

Henry

When the weather gets cold -21F and it get slightly humid, I get this from my York full mode furnace. This one is the largest in the past 12 winters

pecmsg

That is one strange termination. Along with is that the supply air termination?

Henry

Reducing the outlet to 1.5 from 2, increases the exit velocity. It is supposed to prevent this. I did work in the lab around 1997 for Lennox. This was the solution and in their I & O manuals the following year. The large rectangular piece is the outlet from my Jenn-air stove. The small outlet is from my HTP modulating, condensing hot water tank.

ratio

Looks like electrical PVC conduit & CPVC? Not sweep 90°s either.

Pretty impressive, nonetheless!

STEVEusaPA

MikeAmann said:

Look at the cool snow pattern on the table and chair.

The table looks like someone peeled a giant oreo.

HVACNUT

What's the piece on the end of the vent? Muffler? Did it come with the furnace?
Is that yellow piping the gas line? Top notch.

Henry

FYI it s PVC sch 40. There is nothing in the certified instruction manual or code that says one needs long sweep 90s. I have a steel beam going across to the left of the gas pipe. I had to be creative to bring it to the fire pit. BTW there is a sleeve going through and it is sealed. It will be covered with open ended aluminum covering as per our code in the spring. The St Lawrence valley has strange humidity and we get a lot of very cold and humid days and nights. There were a number of manufacturers that sent equipment to be tested in our environment.

Zman

That is one beautiful dog ice sculpture

bucksnort

MikeAmann said:

Look at the cool snow pattern on the table and chair.

Looks like a meringue pie

ChrisJ

Is the one next to it the intake? Is that setup to funnel rain and snow into the intake?

flat_twin

LOL! I noticed our concentric vent had a short ice "goatee"

dopey27177

To rid yourself of the ice-capade, build an enclosure around the offedng pipe work. Do not forget to heat the space so ice will not form in the enclosure,

Jake

ratio

If that's a 6" lap on the siding, there's about 4' of flue exposed to the cold. I think I'd try some insulation around it to see if we couldn't keep it warm enough that the moisture dissipates (or at least snows) instead of immediately freezing.

mattmia2

Isn't it supposed to be pitched to drain back to the appliance?

jad3675

mattmia2 said:

Isn't it supposed to be pitched to drain back to the appliance?

Yeah, but there is still going to be some water in the flue exhaust. Maybe enough to freeze like that? I get some frozen condensate on my exhaust plate - meanwhile my condensate drain line is a constant drippage of water.

John

ChrisJ

I like how Henry just posted a "side effect" of very cold temperatures and everyone's trying to fix a problem he doesn't have.

Zman

ChrisJ said:

I like how Henry just posted a "side effect" of very cold temperatures and everyone's trying to fix a problem he doesn't have.

On the same note, this is not my job, I know it has issues, this is a cool ice formation on a random house that I will not be fixing.

mattmia2

has that installation changed the maximum expected snow line and now does not meet code?

Zman

I see a modified concentric with an uninsulated extension as well as no bird screen. It's probably too close to the window and the meter as well.
I honestly was just admiring the art. Just like the dog with the long skinny neck @Henry posted, I can't imagine how those 2 boilers produced such perfect molar teeth.

JUGHNE

Perhaps pitched the wrong way and cond water not returning to inside unit for draining?

Never seen the screen before around the pipes near the house. Can anyone elaborate?

Zman

I think they pulled apart a concentric and extended it.

Once again, we are here to view the ice artwork, not to fix someone else's system

Henry

Bird screen is not required. There are several manufacturers of condensing equipment that will permit uninsulated exposed vents including HTP and Lennox among others. As can be seen in this picture, the exhaust gases are accelerated away from the structure. The short 1.5 inch reduction acts as a spray nozzle of a garden hose. This prevents damage to the siding.

HVACNUT

Henry said:

The short 1.5 inch reduction acts as a spray nozzle of a garden hose. This prevents damage to the siding.

Yes but is it approved by the manufacturer?
I personally have never seen the exhaust reduced.

Zman

HVACNUT said:

Henry said:

The short 1.5 inch reduction acts as a spray nozzle of a garden hose. This prevents damage to the siding.

Yes but is it approved by the manufacturer?
I personally have never seen the exhaust reduced.

Some people just can't appreciate fine art!

EBEBRATT-Ed

Reducing the exhaust pipe size was a trick by Lennox on the old pulse furnaces as I recall

SuperTech

EBEBRATT-Ed said:

Reducing the exhaust pipe size was a trick by Lennox on the old pulse furnaces as I recall

It's been a while since the last time I worked on a Pulse, but didn't Lennox increase then reduce the flue pipe on the Pulse? I think it would come off the furnace with 2" then increase to 3" and it would be 2" again at the termination. I think it was an attempt to reduce noise but I could be wrong. 

ChrisJ

Wouldn't the unit alarm out if the exhaust was too restrictive?

jim s_2

EBEBRATT-Ed said:

Reducing the exhaust pipe size was a trick by Lennox on the old pulse furnaces as I recall

Yep,their exhaust termination kits included a 2"x11/2" pvc reducer along with a short piece of 11/2" pipe.